msokolov commented on a change in pull request #1155: LUCENE-8962: Add ability
to selectively merge on commit
URL: https://github.com/apache/lucene-solr/pull/1155#discussion_r365837767
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File path: lucene/core/src/java/org/apache/lucene/index/IndexWriter.java
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@@ -3223,15 +3259,44 @@ private long prepareCommitInternal() throws
IOException {
// sneak into the commit point:
toCommit = segmentInfos.clone();
+ if (anyChanges) {
+ mergeAwaitLatchRef = new AtomicReference<>();
+ MergePolicy mergeOnCommitPolicy =
waitForMergeOnCommitPolicy(config.getMergePolicy(), toCommit,
mergeAwaitLatchRef);
+
+ // Find any merges that can execute on commit (per
MergePolicy).
+ commitMerges =
mergeOnCommitPolicy.findCommitMerges(segmentInfos, this);
+ if (commitMerges != null && commitMerges.merges.size() > 0) {
Review comment:
Would we sometimes get !=null and == 0??
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